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2CDH781010R0557 ABB S751DR-K40 40 A 1-Pole Type K 25 kA Selective MCB
ABB S751DR-K40 is a 40 A single-pole Type K selective miniature circuit breaker with a 25 kA breaking capacity for coordinated electrical distribution protection.
£67.33
Why Choose the ABB S751DR-K40 Selective MCB?
The ABB S751DR-K40 is a high-performance 1-pole selective miniature circuit breaker (MCB) designed to provide dependable overload and short-circuit protection in electrical distribution systems. Part of ABB's S750 selective circuit breaker range, it combines a rated current of 40 A, Type K tripping characteristic and a high 25 kA breaking capacity.
Designed for selective circuit protection, the S751DR-K40 supports coordinated protection arrangements where downstream faults should be isolated without unnecessarily disconnecting upstream sections of the installation. Its Type K characteristic is suitable for appropriate circuits with elevated starting or inrush currents, including certain motor and inductive load applications.
The S751DR-K40 combines ABB circuit protection technology with a robust modular design for professional electrical installations. ABB order code 2CDH781010R0557 identifies this specific 40 A, single-pole Type K selective version.
Key Advantages
- Selective miniature circuit breaker for overload and short-circuit protection.
- 40 A rated current for electrical distribution circuits.
- 1-pole configuration for single-pole circuit protection.
- Type K tripping characteristic suitable for appropriate loads with elevated starting or inrush currents.
- High 25 kA short-circuit breaking capacity.
- Designed to support selective protection coordination in suitable distribution systems.
- Part of ABB's established S750 selective circuit breaker range.
Key Features
- ABB S750 series selective MCB.
- 40 A rated current.
- 1 pole.
- K tripping characteristic.
- 25 kA short-circuit breaking capacity.
- Selective operating characteristics for coordinated circuit protection.
- Overload and short-circuit protection.
- Modular construction for professional electrical distribution systems.
Selective Circuit Protection
Selective circuit protection is used to coordinate protective devices so that a fault is disconnected as close as practical to its source while unaffected sections of the electrical installation can remain energised. This can improve continuity of supply and simplify fault isolation in appropriately designed distribution systems.
The ABB S751DR-K40 is designed for this type of coordinated protection arrangement, combining a 40 A rating, Type K characteristic and 25 kA breaking capacity in a single-pole selective circuit breaker. The Type K characteristic makes it suitable for appropriate loads with elevated inrush currents, while correct selectivity depends on the characteristics and ratings of the protective devices used throughout the installation.
Typical Applications
- Selective electrical distribution systems.
- Industrial electrical distribution boards.
- Commercial building distribution.
- Motor and inductive load circuits with appropriate starting-current characteristics.
- Installations requiring coordinated upstream and downstream protection.
- Circuits where continuity of supply to unaffected sections is important.
Technical Specifications
| Series | S750 |
|---|---|
| ABB order code | 2CDH781010R0557 |
| Product type | Selective miniature circuit breaker (MCB) |
| Number of poles | 1 |
| Rated current | 40 A |
| Tripping characteristic | K |
| Short-circuit breaking capacity | 25 kA |
| Protection function | Overload and short-circuit protection |
| Protection characteristic | Selective |
Frequently Asked Questions
What is the ABB S751DR-K40 used for?
The S751DR-K40 is a selective miniature circuit breaker designed to provide overload and short-circuit protection in electrical distribution systems requiring coordinated protective device operation.
What is the rated current of the ABB S751DR-K40?
The S751DR-K40 has a rated current of 40 A.
What breaking capacity does the S751DR-K40 provide?
The S751DR-K40 provides a short-circuit breaking capacity of 25 kA.
What does the Type K characteristic mean?
The Type K tripping characteristic is suitable for appropriate circuits with elevated starting or inrush currents, including certain motor and inductive load applications.
How many poles does the ABB S751DR-K40 have?
The S751DR-K40 is a 1-pole MCB for single-pole circuit protection.
Trusted ABB Circuit Protection
ABB selective circuit breakers provide coordinated overload and short-circuit protection for professional electrical distribution systems where dependable fault isolation and continuity of supply are important design considerations.
